sandy hook elementary schoolinnewtown, connecticut,and began firing. when it was over, six adults and 20 first graders were dead. >> they just babies. they shouldn't be taken away from their mother and father. >> reporter: the shooter, 20- year-old adam lanza, killed himself. it was the second deadliest school shooting in u.s. history. in july, a man opened fire during the mid-night premier of the new bat man movie in colorado. >> straight from the ceiling and took a gun and pointed it straight to my face. >> reporter: prosecutors say james holmes killed 12 people wounding 58 others. the shooting death of an unarmed florida teenager sparked protest around the country. >> no justice. >> reporter: neighborhood watchman george zimmerman argued he shot 17-year-old troy a von martin in self-defense but prosecutors eventually charged him with murder. a judge sentenced jared loughner to seven terms of life and he plead guilty to attempted murder. superstorm sandy slammed into the new york city area and left thousands homeless long the east coast. >> those are our homes. we lost everythin